Syringe



-G. T. PEARSONS.

SYRINGE.

APPLICATION FILED IuLv 29, I9I5.

337467. Patented Ap1. 20, 1920.,

5 SHEETS-SHEET l.

G. T. PEARSONS.

4sI/RINGi-i.

APPLICATION FILED JULY 29. 1915.

1 ,337,467. Patented Apr. 20, 1920.

5 SHEETS-SHEET 5.

` n/m m? wh anmeyf srnfrns rnrnnr orsron GEORGE T. PEARSONS,

0F NEVI YORK, N. Y.

SYRNGE.

Specification of Letters Bet-ent. Patgnted Apr, 20, 132,0, Application led .uly 29, lfb'. Serial ITo.' 42,469.

To @Ufo/ont it may coincer/n.- life parts throughoutV the different Views of Be it known that l., lisons, the' drawings. n citizen olithe United States, residng in t .fis a preface to o detailed description or oorou oivennottnn, city, county, and tn construction and operation I wish to @tute or den' orlr, nove invented new and state that While my improved syringe hes l Y f A c userul improvements in Syringes, oi which been devreu lor use particularly as a ire the following is a speciiication.

This invention relu-tes to ges in which the liquid is discharged from e. reservoir hy actuation of a piston therein, und it is the of the invention to pro- Vide n syringe in Which the liquid is dischsrgod at euch inward end outward movement of the piston.

i further object ofthe invention is to syringe of tl is character in which the liquid can be discharged from the reservoir no matter in what position the discharge outlet of the syringe may nother object ot the invention is to prorid' syringe of thistype in which the liqui-i 'from the reser Yoir is discharged by and through a hollen.7 piston stall times. connected to the discharge outlet of the reservoir, und so constructed that the liquid in the reservoir normally does not have access to the interior of the piston, but the letter is reciprocnted it is connected to the reservoir antl a continuous stream or jet ot liquid discharged from the reservoir 'through the piston. y

the drawings accompanying and forma t of this specification Figure l is .1. cional side elevation of n syringe show- ,Cfui "ier inii-y he use-d for furious other purposes.

embodiment ot my invention shown l and l@ of the drawings consists a reservoir 3 for a suituhle tire extiniing liquio, such as corbontetrachlorid, aying n discharge outlet or oriiice in the formation ot a tube 5 supported centrally in one end ot the reservoir, such end being prowith n conicul projecting to constitute e bearing,` for the discharge tube 5 end to also enhance the appearance of the ine liquid is discharged from the reserfoir by a recipo-eble hollow piston or chamber G aci'nutte-l` by a rod 7 connected thereto passing through the reservoir and n stutling box T in a removable cover e?, ,nid rod having a hond grip or handle to manipulate the same. The piston is at all time directly connected to und in communiceti-on with the discharge outlet 5 by a tube 8 carried by the piston und communicating? with the interior thereof slidably engaging in the tube 5. The discharGc tube extends somewhat into the reservoir and to permit the piston to move to the bottom of the reservoir it has e. tubular portion 9 extending therein the passage ot' the discharge tube, rlhe tube S extends through this tuhulnr portion 9 and is fixed Within the piston, or to o `e end of the rod which oroiect into the piston, as shown at l0. To discharge the liquid from the lower-most portion of the piston the inner end of this 'tuhe is crooked or bent reversely, es shown il., this bende-.lso preventing any exit of liquid which may be in the piston when the syringe is not in use.

rlie liquid in the reservoir normally does not have access to the interior of the piston, hut the piston is so constituted that as it is reciproca-ted in one direction liquid from one end of the reservoir Will enter the piston Vand be discharged through the tube 8 enc outlet 5, and when reciprocated in a direction liquid from the opposite end of the reservoir will enter the piston and be discharged through the tubes 8 and 5. For

reverse V tric chambers formed by a pair of tubular members or cylinders 19 and 19 one inside of the other, the inner constituting a piston chamber in which the piston reciprocates, and these chambers are preferably so proportioned that the area of the respective chambers is substantially equal. rlhe upper ends of the cylinders have the common closure 4, and the lower ends are closed by the end 4, or if desired the nose 5 may serve to close the lower ends of said cylinders, the wall 4 being omitted. rlhe inner chamber is connected to the outer chamber at the lower end by ports or openings 22. ln the upper end there is provided for cach chamber'inwardly opening and outwardly closing valves 23 and 24 for a purpose to be hereinafter described. rlChe inner chamber has a supplemental bottom or end 25 with a valve or valves 26 opening into the inner chamber' and closing outwardly to connect and disconnect the chambers for the purpose and in the manner hereinafter set forth.

It will be obvious that should there be any injury, such as denting, of the cylinder 19 the inner cylinder will not be injured and interfere' with the operation of the piston. To fill the reservoir the end 4 is provided with a pair of filler openings, one for each chamber closed by plugs 21 and 21.

The operation of the syringe as above described is as follows: T he piston is normally in its lowermost position as shown in Fig. 1. and as it is moved upward the valves 12 at the top end of the pist-on will be unseated and the liquid enters the piston therethrough from the inner chamber and is discharged through tube 8 as shown in Fig. 1a. Simultaneously with the upward movement of the piston the valves 26 are opened and liquid from the outer chamber drawn into the inner chamberbelow the piston and the valve 23 is opened and air` is drawn into the outer chamber to displace the liquid drawn into the inner chamber. When the piston is moved in a reverse direction or downward the valves 12 in the piston will close and the valves 13 will be unseated and the liquid in the inner chamber below the piston will enter the piston and be discharged through the tube 8. Simultaneously with the downward movement. of the piston the valves 23 and 26 will be closed and the valve 24 to the inner chamber will be opened to permit the entrance of air to displace the liquid which has been discharged therefrom. During the initial operation of the .syringe the piston will preferably be lgiven short reciprocating strokes which are gradually increased as the liquid is discharged from the reservoir. vAfter all the liquid has been discharged the plugs 21 and 21 for the filler openingsl are removed and the respective chambers filled whenl the syringe is again in condition -for use. Y ldhile l have shown only a pair of valves in each end of the piston itwill be obvious that a greater or less number may be provided. Should only two or one valve be provided and the syringe held in a horizontal position with a portion of the liquid discharged the piston may be rotated by the hand grip so that a valve or valves will be in the liquid of the lowermost part of the reservoir. By the provision of the hollow piston and the valves therein the liquid will not have access to the interior of the piston and leakage of the liquid through the discharge outlet is prevented as well as evapora-tion of the liquid. However, should any liquid remain in the piston due to the bend 11 in the tube such liquid will not leali out through such tube and can only be forced or ejected therethrough as by the pressure of the liquid entering the pistou valves. lt will be obvious that by this construction there will at all times be liquid at Vopposite ends of the piston and that such liquid will have access to the piston as it reciprocated whether the chambers are wholly or only partially filled, or whether the syringe is held in a horizontal position or at an angle to the horizontal.

ln Fig. 8 the inner or piston chamber is constructed separate from the cylinder 19 at shown at 19 and mounted in the reservoir to rotate about the axis of the piston. and the piston is connected to the piston rod 7a, as at 27, to rotate with the chamber 19. The chamber 19 is also weighted on one side, as at 28, and provided with valved intales'2), 29 at opposite ends, whereby as the position of the syringe is changed the intakes will assume a position in the lowermost part of the liquid in the reservoir. rlhe inner or piston chamber has a removable cap 30 which. may have a filler opening closed by a plug 31 5 to lill the two chambers thev cover 4 and the plug 31 are removed. And should it be desired to remove the piston and connected mechanism the cover 30 is removed from the chamber 19. llhe piston valves may consist of flap valves 12EL and 13a.V A

To obviate the necessity of the tubular member 9 the `tube to connect the piston with the discharge outlet may consist of telescoping sections 8@ and 8h as shown in Fig. 4. lt will be obvious that when the piston moves upward the inner section Will draw out from the outer section until it reaches a pre-determined point when the outer section 8b Will be drawn out from the discharge tube 5, and When the piston is moved in a reverse direction the one tube will telescope into the other.

In the construction illustrated' in Fig. 5 the inner or piston chamber consists of a tubular member 34e extending from the top to the bottom of the reservoir 3, said tube being connected to the reservoir by ports 35 adjacent the bottom and ports 36. The piston chamber proper is formed by partitions 37 and 38 and located centrally of the reservoir. rihis chamber is connected at the bottom to the reservoir by a pipe 39 having an inwardly opening and outwardly closing suctionV valve et() therein and connected at the upper end to the reservoir by a pipe all also extending` adjacent the bottom ot the reservoir, said latter pipe having a suction valve 42 similar to the valve d0. The outlet from the reservoir is through said chamber by means of a pipe 48 extending to the top of the reservoir and having a flexible hose connected thereto as shown. A hollow piston 6d haifing inwardly opening and outwardly closing suction valves in opposite ends, similar to the piston shown in Figs. l and 3 operates in said chamber, and the liquid is discharged from the reservoir through the piston by a pipe dfi: carried by and communicating with the interior of the piston slidably engaging in the discharge tube rllhe piston is actuated by a rod 4:5 connected thereto and passing` through stuiiing boxes in the Wall 3i' and the top ot the reservoir to the exterior thereof and has a hand grip connected thereto. The operation oiethe syringe in accordance With this construction is substantially the same as that shown in Fig. l except that instead or" the liquid beingl ejected from the ends opposite to the o1 erating` handle it is ejected from the saine end from Which the piston is actuated. rhis type or" syringe is particularly adapted for a fire extinguisher of large caiacity to stand upon the 4door or the like, and to maintain it in a stationary position during? the operation the bottom is provided with laterally projecting portions d5 for the engagement ot'the feet. A locking meniber 7 pivotally supported on the top of the reservoir may be ln'oyided to engage with a transverse slot in the piston rod to lock the same against movement.

in Figs. G and 6L the piston chamber 19b extends transversely oit the reservoir 3 and adjacent the topv` one end ot which chamber is formed with a nose 5a which extends beyond the side of the reservoir and in which the discharge outlet in the forni of a tube 51* is located similar to the construction shoiv'n in Figs. l and 3. The opposite end of the chamber also extends beyond the wall of `the reservoir and has an end 46 removably connected thereto and through which the piston rod 7" passes connected to a piston 6, said piston is hollow and has valve controlled inlet ports l2 and 13C in opposite ends. @he piston 6 is hollow similar to the construction shown in Figs. l, la and 3 havvalves 12C, 13C in opposite ends closing into and opening outward from the piston. The piston also carries a tube 8 slidably engaging the discharge tube 5b having a crooked end llZL Within the piston, said tube extending through the tubular portion 9 of the piston for the engagement ot the end oia the discharge tube 5b. The piston chamber has ports f7 and i8 adjacent each end with intake suction vaves therein and said intakes are so arranged that they have access to the liquid in the loiverniost portion of the reservoir no matter in what position the latter may be held.

'llo permit oil access or the liquid from the lowerniost part ofi the reserifoir the ports and i8 all times and positions oi? the syringe there is connected thereto a pipe 5U extending to the bottom ot' the reservoir and connected to the inlets ot the piston chamber by a tubular member ol having branches inl-ets. the pipe 5^() iiiounfged on ports 5L and 53,. rotaie yherewith an movement t connected pipes and 56 t ally ther-ciro n and the pipe to point acli'ace the reservoir. The pipe 5G loiver end oil pipe 5i and has its intake end adjacent the bottom one side of the i and in normal o sition ot' tl h ave a i i registers with the port 53. pi bent so that the intake end top and the side et the reservoir tut oelovi the piston zhaml 19h. from tl e i o in e norm thereof throng: 'this pipe is shut on the Wall oi the pipe mi but should the extinguisher be inverted the pipe 54 With ini pipes and ivill sli the position the pipe o0 shut ott' by t Y movement being limited ection -il b VVWeen the p '1 Will oe obvious that when 't springe is tilted to an angle the pipe 5l will i te with pipe due to the pin and slot connection 3/ion an axis transi'erse to the axis ot the piston `chamber. and should the syringe be inverted the intake pipe with its branches vfill slide along pipe 50 and also rotate about such pipe. The liquid is disi X, lort o3 and charged through the piston and connected tube (5, ll, the same as in the constructions shown in Figs. l and 8 and the construction of the piston and the connection thereof. to the disc .arge outlet is substantially similar except t1 at the piston valves may be in the llo-rm et" ilap val yrs. r.he top or the reservoir is removable whereby access may be had to the interior or the syringe, but for ordinary purposes or lilling it has an opening closed by plug 59. The cover 58 also has a valved air intel-ie opening (30. rhis construction orn syringe is adapted to be portable and has a conveniently located handle to carry and hold the same.

rlllhe syringe shown in Fig. 'T is olf the stationary type, Vand is substantially the sane as that shown in 5 with the exception that compressed air is utilized to eject the liquid troni the reservoir. For this purpose an air chamber 6G extends from the top to the bottom oi" the reservoir in which the discharge outlet or the reservoir is located and is in the iiorm or a tube (ST extending from adjacent the bottom of said chamber and out through the top ot the reservoir.V

rThe piston chamber is substantially the same as that shown in Fig. 5 having valved intakes 39 and 4l. The piston chamber is connected to the air chamber by a pipe 68 having a check valve 69 opening into the air chamber and closing into the piston chamber. The piston 6 is substantially the same as shown in Fig. 5 having valves 13e; l2@ opening into and closing outward from the piston and is connected to the air chamber by a pipe 44a slidably engaging in pipe 68. The operation or this type or syringe is substantially the same as 'the operation or the construction shown in Fig. 5 with the exception that instead or liquid being directly expelled through the outlet through the piston, it is expelled from the piston into the air chamber compressing air therein and such compressed air ejecting the liquid from the air chamber through the tube 67.

Having thus described my invention, l claim 1. In a syringe, the combination oi a rcservoir having a discharge outlet; a tube constituting a continuation of the outlet; a second tube slidable in the hrst tube; piston mechanism to which the second tube is connected, and a rod to reciprocate the piston mechanism and second tube to draw liquid from the reservoir and discharge the liquid through the reciprocable tube and outlet.

2. In a syringe the combination of a reservoir having a discharge outlet; a cylinder therein; a hollow piston to reciprocate in said cylinder; a rod connected to one end or' the piston to extend to the exterior or the reservoir to reciprocate the piston; a tube carried at the opposite end of the piston and communicating with the interior thereof engaging in the reservoir outlet to at all times connect the piston to the outlet or the reservoir; and valves in opposite ends of the piston to connect one end or the piston to the reservoir when moved in one direction and to connect the opposite end or the piston to the reservoir when moved in a reverse direction to discharge the liquid through the piston, piston tube and reservoir outlet during the reciprocation or thepiston.

3. ln a syringe the combination of a reservoir having a discharge outlet; a hollow piston in said reservoir; a piston rod to reciprocate the piston; a tube carried by the piston and communicating with the interior thereof slidably engaging in the discharge outlet; and checlr valves in opposite ends et' the piston to connect the piston to the reservoir during the reciprocation thereof to discharge the liquid through the piston.

et. ln a syringe the combination oi" a cylinder having a discharge outlet; a hollow piston to fit and reciprocate in said cylinder; a rod connected to the piston and extending to the exterior et the cylinder to reciprocate the piston; atube' carried by and connected to the interior or" the piston and slidably engaging in the cylinder outlet to connect the piston to the outlet in all positions thereof; and check valves in opposite ends or the piston to normally cut oli communication between the piston and reervoir and operable to alternately connect the piston to the liquid .in the cylinder at opposite ends of the piston when the piston is reciprocated to discharge the liquid Jfrom the cylinder through the piston, the tube carried thereby and the discharge outlet of the cylinder.

5. ln a syringe the combination of a reservoir having a discharge outlet; a hollow piston to reciprocate in the reservoir; a rod connected to the piston extending to the eX- terior of the reservoir to reciprocate the piston; valves in opposite ends or said piston to connect one end oi' the piston to the reservoir when moved in one direction and connect the opposite end or' the piston to the reservoir when moved in a reverse direction; and a tube carried by and connected to the interior of the piston and slidably engage in the discharge outlet ot the reservoir to connect the piston to the reservoir outlet in all positions thereof, the inlet oit' said tube being so arranged in the piston as to permit exit of the liquidY from the piston only during` the reciprocation thereof.

6. ln a syringe the combination of a reservoir; a cylinder in the reservoir connected at opposite ends to the reservoir and having a discharge outlet at one end; a hollow piston in the cylinder; a rod connected to the piston to VeXtend to the exterior oic the cylinder and reservoir opposite to the discharge outlet to reciprocate the piston; a tube reciprocable with the piston at all times connected to the discharge outlet; and valves in the piston operable durino' the reciprocation of the piston to alternately connect opposite ends of the cylinder' vfith the discharge outlet through piston and connected tube.

7. ln ringe the combination oi? a reserl e' a discharge outlet; a chamber reservoir connected tethe apposite ends i, holloiv piston to reciprccite in said cna-mber; a rodL connected to the piston to reciprocate the same; means to at all times connect the interior ot the piston to the outle g and valves in opposite ends et said piston; said piston when moved in one direction draiving liquid from one end ot the chamber and discharging` it through the piston and draiving liquid from the reservoir into the opposite end oi. the chamber, and when moved in a reverse direction drawing liquid thereinto from said opposite end of the chamber and discharging it through the piston and draiving liquid trom the reservoir to the other end ot the chamber.

8. In a syringe the combination of a reservoir having a discharge outlet; 'a chamber Within said reservoir connected at opposite ends to the reservoir; a holloiv piston in said chamber; a rod connected to the piston to reciprocate the same g a tube connected to the interior oit the piston and slidably engaging in the discharge outlet; and valves in the piston operable When the piston is moved in one direction to connect that end of the chamber with the piston toward which the piston is moving and connect the opposite end of the chamber to the reservoir, and when moved in a reverse direction disconnecting such opposite end ot' the chamber from the reservoir and connecting it with the piston and shutting oft communication between the other end oit the chamber with the reservoir and piston, substantially as and for the purpose specified.

9. ln a syringe the combination of a reservoir; a cylinder extending` transversely of the reservoir, said cylinder haifing intakes adjacent opposite ends and having a discharge outlet at one end to the Vexterior of the reservoir; a piston in said cylinder; a tube carried by the piston at all times connected to the discharge outlet; a rod connected lto the end of the piston opposite to the tube and extending to the exterior of the cylinder and reservoir to reciprocate the piston; and a suction inlet connected to the cylinder intakes rotatable about an axis transverse to the axis of the piston and cylinder.

l0. In a syringe the combination of a reservoir; a cylinder extending transversely of the reservoir having an intake adjacent each end and having a discharge outlet at one end to the exterior of the reservoir; a piston in said cylinder; a tube carried by the piston at all times connected to the discharge outlet; a rod connected to the end ot the piston opposite 'to the tube and extending' to the exterior of the cylinder and reservoir to recigrocate the piston; and means connected to the cylinder intakes to at all times connect the cylinder With the liquid in the reservoir in all positions thereof.

ll. ln a syringe7 the combination of a reservoir having a discharge outlet; a piston cylinder fixed Within the reservoir; suction inlet means to connect the opposite ends ot' the cylinder to the reservoir and rotatable on an axis transverse to the axis of the cylinder; and piston mechanism to reciprocate in the cylinder arranged to alternately discharge the liquid from the cylinder at opposite sides or the piston mechanism through :the outlet during the reciprocation thereof.

l2. ln a syringe, the combination of a reservoir; a cylinder xed in the reservoir near one end to extend transverse of the reservoir and having an outlet to the exterior oi0A the reservoir; a piston to reciprocate in the cylinder; suction inlets to opposite ends of the cylinder; means to alternately connect the outlet with the cylinder at opposite sides oie the piston d ring the reciprocation of the piston; and intake means to the suction inlets of the cylinder having' an inlet near the encL of the reservoir opposite the cylinder and an inlet at the end of the reservoir near the cylinder, and adapted to assume a position near that side portion oi' the reservoir which is loivermost for the purpose specied.

13. ln a syringe the combination of a reservoir; a cylinder adjacent one end of the reservoir extending transversely ot the reservoir having an outlet to the exterior ot the reservoir; a reciprocable piston; suction inlets to opposite ends oit the cylinder rotatable on an axis transversely of the axis ci the cylinder one et' said inlets lying adjacent the end of the reservoir and below the cylinder and the other inlet lying adj acent the opposite end ot the reservoir and both being adjacent the side et the reservoir; means to shut eti coi munication between one oic said inlets and the cylinder when the other is connect-cd therewith; and valve mechanism to control the entrance ot liquid to and its discharge from the cylinder on opposite sides of the piston. substantially as and for the purpose specied.

14. In a syringe, the combination of a reservoir; a piston cylinder fixed transversely1 in said reservoir near one end and having an outlet to the exterior et the reservoir with suction inlets to opposite ends thereof; an intake to said suction inlets movable on an axis transverse of the axis of the piston cylinder arranged to connect the suction inlets rWith the liquid near the side of the reservto reciprocate in the cylinder; and means t alternately discharge the liquid from the piston vcylinder at opposite sides of the piston yduring the reciprocation of the piston.

15. In a syringe the combination of a reservoir; a piston cylinder in said reservoir having an outlet to the exterior of the reservoir and inlets to opposite ends thereof; intakes to said inlets revoluble on an axis centrally of the reservoir and transverse of the axis of the piston cylinder; a reciprocable piston; andmeans to discharge the liquid from opposite ends of the piston cylinder through the outlet during'the reciprocation of the piston.

16. In a syringe` the combination of a reservoir; a `piston cylinder in said reservoir having an outlet to the exterior of the reservoir and'inlets to opposite ends thereof; aV 4pair of intakes to said inlets revoluble on an axis centrally of the reservoir and transverse of the axis of the piston cylinder; valve mechanism toshut off one of said intakes from the cylinder inlets When the other is connected thereto; a piston to reciprocate in the piston cylinder; and means to discharge the liquid from opposite ends of the piston cylinder through the cylinder outlet during the reciprocation of the piston. Y

17. In aV syringe; the combination of a reservoir having a discharge outlet; `a tube secured in said outlet constituting a continuation thereof; a piston chamber having suction inlets to opposite ends thereof from the reservoir; a hollow piston in said chamber; a second tube connected to said piston and slidably engaging in the first tube; and arod to reciprocate saidpiston; said lpiston being arranged and adapted to alternately draw liquid to and discharge it from the piston chamber at opposite sides of the piston through the slidable tube and outlet.

18. In a syringe, the combination of a reservoir having an outlet; a piston cylinder fixed Within said reservoir; an intake to the piston cylinder rotatable on an aXis transverse to the axis of said cylinder and arranged to draw the liquid from the reservoir near the side and ends of the reservoir, and

piston mechanism to draw liquid from the reservoir into the piston cylinder through the intake' and discharge it through the reservoir outlet.

19. In a syringe,the combination of a reservoir having Vanoutlet; a piston cylinder in said reservoir having suction inlets to opposite ends thereof; means rotatable on an axis transverse to the axis of the'piston cylinder 'to connect the suction inlets with.

the liquid in the reservoiradj acent theend of the reservoir and the Wall of the reserlvoir opposite to the piston cylinder and adjacent the piston cylinder; a reciprocablev piston to reciprocate in said cylinder; a liXed Y tubular member in the-reservoir in communication With the inlet ports ofthe piston cylinder; intake means connected to said tubular member comprising tubes having inlets from opposite ends of the reservoir and adapted to assume variable positionsnear the side of the reservoir; valve mechanism operable to shut off the Vliquid from the reservoir to the piston cylinderfthrough an intake tube When the piston cylinder is connected to the reservoir throughthe other intake tube; and valve mechanism'operable through lthe reciprocation of the piston to control the entrance of liquid to Vand its discharge from the pistonV cylinder atopposite sides of the piston. y

' -1 GEO. T. PEARSONS. 

